trim()trim()

删除指定正则表达式的所有前导匹配项和尾随匹配项。Removes all leading and trailing matches of the specified regular expression.

语法Syntax

trim(regex, text)trim(regex, text)

参数Arguments

  • regex:要从 text 的开头和/或结尾修剪的字符串或正则表达式regex: String or regular expression to be trimmed from the beginning and/or the end of text.
  • text:一个字符串。text: A string.

返回Returns

修剪 text 开头和/或结尾的 regex 匹配项后的 text。text after trimming matches of regex found in the beginning and/or the end of text.

示例Example

以下语句从 string_to_trim 的开头和结尾修剪 substring:Statement bellow trims substring from the start and the end of the string_to_trim:

let string_to_trim = @"--https://bing.com--";
let substring = "--";
print string_to_trim = string_to_trim, trimmed_string = trim(substring,string_to_trim)
string_to_trimstring_to_trim trimmed_stringtrimmed_string
--https://bing.com-- https://bing.com

下一条语句从字符串的开头和结尾修剪所有非单词字符:Next statement trims all non-word characters from start and end of the string:

range x from 1 to 5 step 1
| project str = strcat("-  ","Te st",x,@"// $")
| extend trimmed_str = trim(@"[^\w]+",str)
strstr trimmed_strtrimmed_str
- Te st1// $- Te st1// $ Te st1Te st1
- Te st2// $- Te st2// $ Te st2Te st2
- Te st3// $- Te st3// $ Te st3Te st3
- Te st4// $- Te st4// $ Te st4Te st4
- Te st5// $- Te st5// $ Te st5Te st5